Fe对工业连续重整催化剂性能的影响  

Effect of Fe on performance of industrial continuous reforming catalyst

作　　者：张若霖 安谧 吴玉超 陈菲 张鹏[1] 徐华 ZHANG Ruolin;AN Mi;WU Yuchao;CHEN Fei;ZHANG Peng;XU Hua(PetroChina Petrochemical Research Institute,Beijing 102206,China)

机构地区：[1]中国石油石油化工研究院,北京102206

出　　处：《石油化工》2023年第6期749-755,共7页Petrochemical Technology

基　　金：中国石油天然气股份有限公司局级项目(22-YK-06-05)。

摘　　要：以连续重整催化剂新鲜剂、中等活性和低活性的再生催化剂为研究对象,考察了催化剂活性下降原因,采用XRD、电化学工作站、XPS、ICP、SEM、STEM、N2吸附-脱附等多种方法对催化剂进行表征,研究了Fe对工业连续重整催化剂性能的影响。实验结果表明,Fe以γ-Fe_(2)O_(3)的稳定形态均匀分布于还原后活性降低的催化剂中,Fe的沉积没有加速Pt原子形成Pt晶粒,Pt原子在载体表面依然呈现原子级分散特性。Fe沉积会影响金属中心的析氢能力,影响金属中心的加/脱氢性能,加速积碳的形成。催化剂金属中心加/脱氢效率下降、载体氧化铝维持氯含量能力弱化、积碳加速生成是导致催化剂活性下降的主要原因。The reasons for the decrease in activity of continuous reforming catalyst were investigated using fresh catalyst and regenerated catalyst with medium activity and low activity as research objects.The catalysts were characterized using various methods such as XRD,electrochemical workstation,XPS,ICP,SEM,STEM,N2 adsorption-desorption,etc.The effect of Fe on the performance of industrial continuous reforming catalyst was studied.The experimental results show that Fe in the stable form of γ-Fe_(2)O_(3),is uniformly distributed in the catalyst with reduced activity after reduction.The deposition of Fe does not accelerate the formation of Pt atoms into Pt grains,and Pt atoms are still dispersed at atomic level on the surface of the carrier.However,the deposition of Fe can affect the hydrogen evolution ability and the hydrogenation/dehydrogenation ability of the metal center,thereby accelerating the coke formation.The drop in catalytic performance can be attributed to the reduction of hydrogenation/dehydrogenation efficiency of catalyst metal center,the weakening of carrier Al_(2)O_(3) ability to maintain chlorine content and the accelerated formation of coke.

关 键 词：Fe形态 加/脱氢能力 团聚 工业连续重整催化剂 失活 

分 类 号：TQ426[化学工程]